ISL31490EIUZ

Overview

The ISL31490EIUZ is a full-duplex, fault-protected RS-485/RS-422 transceiver operating on a single 5V supply. It supports data rates up to 250kbps with slew-rate limiting and features an extended common-mode voltage range of ±25V. Bus pins tolerate faults up to ±60V and transient overvoltages up to ±80V. The device delivers a typical differential output voltage of 2.5V into a 54Ω load and includes hot-plug circuitry that keeps outputs in a three-state condition during power-up or power-down. It operates within a temperature range of -40°C to +85°C.

Feature Summary

• Extended common-mode range exceeding standard RS-485 requirements for robust operation
• High fault protection tolerance on bus pins against overvoltage conditions
• Full fail-safe receiver design ensuring defined logic states under open or shorted conditions
• Hot-plug capability maintaining high-impedance states during system power transitions

Applications

• Utility meters and automated meter reading systems
• PROFIBUS and fieldbus networks in factory automation
• Security camera networks
• Building lighting and environmental control systems
• Industrial process control networks

Procurement Notes

Verify the specific ordering suffix 'IUZ' corresponds to the 10-lead MSOP package configuration before procurement. Confirm that the component meets RoHS compliance standards as specified in the manufacturer's documentation. Ensure the selected variant matches the required full-duplex functionality and thermal performance characteristics for the intended application environment.

Selection Notes

Select this component when designing systems requiring high noise immunity and operation in electrically noisy environments with significant common-mode voltages. The 10-lead MSOP package is suitable for space-constrained designs. Verify that the 250kbps data rate aligns with the network requirements, as higher-speed variants exist within the same family for faster communication needs.

Part Context

This part belongs to the ISL3149xE series of fault-protected differential transceivers designed to exceed RS-485 and RS-422 standards. The series offers various configurations including half-duplex and full-duplex options with different data rates. The ISL31490E specifically provides full-duplex communication with built-in slew-rate limiting to reduce electromagnetic interference.

Replacement Considerations

Consult the ISL32490E datasheet for exact replacement options if newer revisions are required. Verify pin compatibility and electrical specifications against existing designs when substituting other RS-485 transceivers from different manufacturers.